/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.extensions.euphoria.core.client.functional;



import com.bff.gaia.unified.sdk.extensions.euphoria.core.annotation.audience.Audience;



/** A function that is composition of two unary functions. */

@Audience(Audience.Type.CLIENT)

public class CompositeUnaryFunction<InputT, OutputT, X> implements UnaryFunction<InputT, OutputT> {



  private final UnaryFunction<InputT, X> first;

  private final UnaryFunction<X, OutputT> second;



  private CompositeUnaryFunction(UnaryFunction<InputT, X> first, UnaryFunction<X, OutputT> second) {

    this.first = first;

    this.second = second;

  }



  public static <InputT, OutputT, X> CompositeUnaryFunction<InputT, OutputT, X> of(

	  UnaryFunction<InputT, X> first, UnaryFunction<X, OutputT> second) {

    return new CompositeUnaryFunction<>(first, second);

  }



  @Override

  @SuppressWarnings("unchecked")

  public OutputT apply(InputT what) {

    return second.apply(first.apply(what));

  }

}